mirror_zfs/include
Rob Norris 15a6b982c5 linux/super: add tunable to request immediate reclaim of unused dentries
Traditionally, unused dentries would be cached in the dentry cache until
the associated entry is no longer on disk. The cached dentry continues
to hold an inode reference, causing the inode to be pinned (see previous
commit).

Here we implement the dentry op d_delete, which is roughly analogous to
the drop_inode superblock op, and add a zfs_delete_dentry tunable to
control its behaviour. By default it continues the traditional
behaviour, but when the tunable is enabled, we signal that an unused
dentry should be freed immediately, releasing its inode reference, and
so allowing that inode to be deleted if no longer in use.

Sponsored-by: Klara, Inc.
Sponsored-by: Fastmail Pty Ltd
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Alexander Motin <alexander.motin@TrueNAS.com>
Signed-off-by: Rob Norris <rob.norris@klarasystems.com>
Closes #17746
2025-09-17 16:34:14 -07:00
..
os linux/super: add tunable to request immediate reclaim of unused dentries 2025-09-17 16:34:14 -07:00
sys Fix txg_log_time ZAP key typo 2025-09-15 12:44:01 -07:00
.gitignore OpenZFS restructuring - move platform specific sources 2019-09-06 11:26:26 -07:00
cityhash.h SPDX: license tags: MIT 2025-03-13 17:56:54 -07:00
libnvpair.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
libuutil_common.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
libuutil_impl.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
libuutil.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
libzdb.h libzdb: Initial breakout of libzdb 2024-02-05 10:00:41 -08:00
libzfs_core.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
libzfs.h Add TXG timestamp database 2025-08-06 10:31:21 -07:00
libzfsbootenv.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
libzutil.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
Makefile.am Add TXG timestamp database 2025-08-06 10:31:21 -07:00
thread_pool.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
zfeature_common.h Implement physical rewrites 2025-08-06 10:36:56 -07:00
zfs_comutil.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
zfs_crrd.h Add TXG timestamp database 2025-08-06 10:31:21 -07:00
zfs_deleg.h ZFS allow send:encrypted 2025-09-12 15:05:02 -07:00
zfs_fletcher.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
zfs_namecheck.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
zfs_prop.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
zfs_valstr.h events: include zio type in IO error reports 2025-05-30 10:29:29 -04:00